Delaware frost dates
Across 7 weather stations in Delaware, the median last spring frost runs from Mar 29 in Lewes to Apr 11 in Greenwood, and the first fall frost from Oct 30 to Nov 14.
Delaware at a glance
- Weather stations
- 7
- Earliest last frost
- Mar 29 Lewes
- Latest last frost
- Apr 11 Greenwood
- Longest season
- 231 days Lewes
- Typical season
- about 209 frost-free days
- Hardiness zones
- Zone 7b
Frost dates by weather station
| Weather station | Last spring frost | First fall frost | Frost-free days | Zone |
|---|---|---|---|---|
| Dover | Apr 4 | Nov 4 | 214 | 7b |
| Georgetown Sussex County Airport | Apr 4 | Nov 6 | 217 | 7b |
| Greenwood | Apr 11 | Oct 30 | 200 | 7b |
| Lewes | Mar 29 | Nov 14 | 231 | 7b |
| Newark Ag Farm | Apr 7 | Nov 2 | 208 | 7b |
| Wilmington New Castle County Airport | Apr 7 | Nov 1 | 209 | 7b |
| Wilmington Porter Research | Apr 7 | Nov 4 | 209 | 7b |
Median dates from NOAA 1991–2020 climate normals. How to read them.